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arXiv 1802.05964cond-mat.supr-conhep-thphysics.optics
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立方非中心对称超导体中的负refractive index

Negative refractive index in cubic noncentrosymmetric superconductors

Tomoya Hayata

摘要:

研究了立方非中心对称超导体的负折射率。我们考虑了迈斯纳效应下的麦克斯韦方程组,以及由于反转对称性破缺而产生的磁电效应。我们推导了电磁波的色散关系,并表明折射率在低于希格斯间隙的频率处变为负值。我们发现,通常在负介电常数的手征材料中讨论的负折射率的手征机制可以通过用Higgs间隙代替等离子体间隙而应用于正介电常数的超导体。由实验值估算的LiPt $_3$ B的穿透深度表明,在紫外区可能出现负折射率。LiPt $_3$ B可以在比迄今为止观察到的任何其它材料更短的波长下表现出负折射率。

英文摘要:

We study the negative refractive index in cubic noncentrosymmetric superconductors. We consider the Maxwell equations under the Meissner effect, and magnetoelectric effect arising due to broken inversion symmetry. We derive dispersion relations of electromagnetic waves, and show that the refractive index becomes negative at frequencies just below the Higgs gap. We find that the chiral mechanism of the negative refractive index, which is usually discussed in chiral materials with negative permittivity can be applied to superconductors with positive permittivity by replacing the plasma gap with the Higgs gap. Estimation from the experimental values of the penetration depth of LiPt$_3$B indicates that the negative refractive index may appear in UV regions. LiPt$_3$B may exhibit the negative refractive index at wavelengths shorter than any other material observed so far.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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